87 
Groups b Groups F 
An Str.-Pet. = — 0'34 — 0"36 
— 0.03 — 0.53 
+ 0.42 + 0.81 
— 0.66 | — 0.69 
Mean: — 0".20 5 0534 
or, deducing corrections to NEwcoMB's 7: 
Groups B Groups F 
An N,, = + 0"19 + 0'17 
+ 0.50 + 0.00 
+ 0.95 + 1.34 
— 0.13 — 0.16 
Mean: + 0".33 RACE de 0".29 
B and F together: An Newcomp (centennial) = + 0".31 + 0".18. 
Another method of determining An and X consists in solving 
both unknowns at the same time from sets of two equations with 
two unknowns, that is from: 
| beosd = Ansin d + 0.93 X 
and e= An + (0.93 + 0 20 cos? d) X sin J. 
In this way I find the following values for A and An (StRvvE- 
PETERS) : ; 
Groups B Groups F Band F 
x An X An An 
+117 —O"54 + 0"53 — 0"39° — 0°46 
+ 0.49 — 0.00 40.56 —0.57 — 0.28 
—014 ++ 0.60 +040 -+ 0.82 + 0.71 
+ 0.51 — 0.64 +0.79 — 0.88 — 0.76. 
In connection with the weights given to the R.A. and the Deel. | 
attribute to the results from the 4 catalogues the weights 1.9, 1.2, 
1.1 and 1.3. 1 then find as mean values: 
Groups B Groups F Band F 
X = + 0"60 + 0"57 
An Str.-Pet. = — 0.21 — 0.30 — 0"26 
therefore as correction An to NewcoMB: 
Groups B Groups F B and F 
An (Newcoms) = + 0".32 + 0'.23 + 0".27. 
